Mode of sharpening saws



UNITED STATES PATENT OEEIc MODE OF SHARPENING SAWS.

Specification forming part of Letters Patent No. 5|,l68, `dated November 28, 1865.

To all whom it may concern:

Be it known that I, CHARLES P. FEAZER, of Allowaystown, in the county of Salem and State of New Jersey, have invented a new and Improved Mode of Sharpening Saws andI do hereby declare that the following is a full, clear, and exact description of the construction and operation ot' the same, reference being had to the annexed drawings, making a part of this specification, in ,which- Figure l is a perspective view of the apparatus for sharpening` saws, and parts in connection therewith, and a saw in position to be led. Fig. 2 is a top view of the swivel G. Fig. 3 is an edge view of the same. Fig. 4is a vertical longitudinal section of the file-slide D.

Like letters in all the figures represent the same parts.

The nature of my invention consists of circular clamps for holding, and, in connection therewith, a device for sharpening hand and other similar saws, which will be understood by the following description:

A is a bed-plate, which is fasten ed on a table or bench by means of screws which pass through the countersunk holes a a. The said bed-plate has a circular edge,B, against which the saw is clamped for ilin g, the said edge projectin g upward above the bed-plate far enough to bite the saw near the roots ot' the teeth.

C is a spring-plate, which I make of sheet iron or steel, constituting the outer clamp, which is made to hold the saw firmly against the circular clamp B by means of the screws b c, the former ot which always remains in position to hold one end of the clamp C, but the latter is usually removed, to provide for readily removing the saw.

D is a sliding bar, with which the ile E is connected,there being ahole, d, in its bowed end for the reception .ot' the handle F at the outer end of the bow, and a hole, e, in the inner end of the same, into which the tail end of the file is placed., There is a setscrew,f, for fastening the handle F, so as to keep the file steadilyin position to suit the angle of the teeth. The said sliding barD is guided by means ofthe slots g g in the uprights LL of the reversible swivel G, which rests upon the bed-plate A, and turns freely upon the swivel-pin z', so that by a movement of the swivel the le E may be placed between .the teeth successively, for sharpening the same. There are holes]` in the ends ot' the segmental portion G of the swivel G, in one of which the pin t' is placed to give the desired angle to the file in order to produce the proper Obliquity to the edges of the teeth. I have represented but two holes at each end, yet any number may be adopted.

H and H are adjustable ngers for holding the swivel G, only one of which is brought into requisition while iiling from one side of the saw. The finger H is placed in position, as represented in Fig. 1, with its outer and an gular end placed in a notch in front of a tooth to be filed, and is moved in correspondence to the successive ling of the teeth, until the tiling from one side of the saw is completed, during which time the iinger H is turned out oi' the way, as represented, by means of the swivelpin k. Then the fingers are reversed for filing the teeth on the other side of the saw. There is a set-screw, J, for holding the ingers H and H', firmly on the swivel Gr, there being an oblong hole or slot, l, in the fingers, through which the screw passes, so as to admitot' the adjustment of the same to suit the different sizes of the teeth oi' the saws.

To admit ot' the fingers being swung back and forth without removing the set screw or screws J, the slots Z may be opened at the inner side of the fingers.

The operation is as follows: The saw is placed in position between the clampsB and C, as represented in Fig. l, and the swivel G placed with the proper holej on the center pin, 2', so as to produce the requisite angle to the teeth of the saw, and the inger H being properly adjusted, the front tooth is led, andthe le raised up by means of the handle F, the sliding bar D moving freely in the upright slots gg ofthe uprights or studs 7L h of the swivel G, and the swivel being turned far enough for the tile to fall between the third and fourth teeth, and the finger H being placed in position between the first and second teeth, another tooth is sharpened by sliding the bar D backward and forward by means of the handle F, the le being slightly raisedin its backward movements to clear the teeth; and so on, in succession, every other tooth is filed, until the handle end of the saw is reached, the outer end may readily be accomplished by curving thel bed-plete along the inner side of the clamp B. When the saw is lfiled alt one side every other tooth the swivel is reversed, so as to bring the opposite end of the segmental portion Gr in connection with. the pivot il, `andthe ingers H andyH' are also reversed, the standing one beingthen placed in regular succession between ntheteeth. The sew is filed at the second side in "like manner from the 'rail tothe handle end of the saw'.

Having ldescribed my invention, Whatlclaim es new, sind desire to secure by Letters Petent, is

1. The combination of the concentric clamps B end C with the bed-plate A, for holding e sew in position to be filed, substantially as herein described.

2. The combination of the sliding; ber D with the file E, the reversible swivel G, and ingers H and H', the Whole being constructed and arranged in relation to each other and to vthebed-plzlte A, and clamps B and C, sub

stnntially as and for the purpose set forth.

In testimony that the aboveis my'inven tion I have hereunto set my hand and aixed my sealr this 10th day of July, 1865. y

CHARLES I. FRAZER. [L s.] Vi] i tnesses:

YSTEPHEN Us'rrcir,

JOHN WHITE. 

